Grünfeld Defense

The Grünfeld Defense arises when Black answers d4 and c4 with ...Nf6, ...g6, and an early ...d5. It is a hypermodern opening: Black is willing to let White build a large pawn center, but intends to turn that center into a target.

The Grünfeld challenges the center with ...d5

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StartNc3d5

White occupies the center and Black prepares the clash

After d4, c4, and ...g6, the placement of both knights permits the defense's characteristic response.

After exchanges on d5, White may occupy the center with pawns while Black develops the bishop to g7 and pressures the central d4-pawn with moves such as ...c5 and ...Nc6. A broad center gives space, but it also contains pawns that must be defended. If Black creates enough pressure, those pawns can lose mobility or become weaknesses.

White's broad center becomes a target

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c3, d4, and e4 form one central mass: it provides space, but its pawns must advance and defend one another in coordination.

White's space against Black's activity

White owns three connected central pawns, while Black coordinates pieces and a pawn break against that chain.

1. c3, d4, and e4 form one central mass: it provides space, but its pawns must advance and defend one another in coordination.
2. ...Bg7, ...Nc6, and ...c5 form a connected plan to develop actively and concentrate pressure on White's center.

It is related to the King's Indian Defense, but the treatment of the center is different. The King's Indian usually uses ...d6 and lets White's center form before striking. The Grünfeld plays ...d5 almost immediately. The Russian Variation is one important White response to that pressure.